Intervening Ni II absorption at zabs ≈ 1.92 in the LBQS 2206-1958 spectrum (black) and simultaneous fit to the main five strongest transitions (red curves), using our f-values. This fit is overlaid on the weaker Ni IIλ1703 transition. At vhelio = 0 km s−1, the redshift is z = 1.9200.
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